10/12/2026
Stink Bugs – Stinking Pest in the Fall
By Anthony Ohmes, MU Extension Field Specialist in Agronomy
Brown marmorated stink bugs are a stinking pest for those whose structures are chosen this fall to invade. Brown marmorated stink bugs (BMSB) are native to Asia. They are notorious hitchhikers and were accidently introduced into the U.S. in the 1990’s. I received my first call in October of 2020. Since then, the numbers in Southeast Missouri have continued to increase. BMSB are brown and have a shield shape with brown-white banding on antennae and abdominal edge. As the name implies they release a very strong, unpleasant odor when disturbed.
BMSB is an agronomic pest during the growing season, feeding on horticultural and agronomic field crops. As the season ends and temperatures cool, BMSB are the only species of stink bug adults that seek structures for overwintering. They do not lay eggs, nor do they feed during the winter. Management includes identifying and seal openings/cracks around structures, ideally before they enter. Avoid sealing up areas now if you do have insects since you would want them to exit the same way next spring. If BMSB enter your home, vacuuming live specimens is the least disturbing, but they will still release a defensive odor. Consider using a shop cannister vacuum, not your indoor home vacuum.
More information on brown marmorated stink can be found in the MU publication Brown Marmorated Stink Bug in Midwest Field Crops.